P

3. Partial safety factors

Table 2.8 (UKNA to BS EN 1990:2002, Table NA.A1.2(B)) for the ULS:

Permanent actions, yg YG = 1-35

Variable actions, yq Yq = 1.5

Material factor for LVL, ym

4. Actions

Self-weight of the beam, Gk.selfwt

Design action from the self-weight of the beam, ikseifwt

Characteristic permanent action from the point load, Gk p

Characteristic variable (imposed) action from the point load, Qk.p

Design action from the point load for the critical load case at the ULS, Fd p

(Table 2.8, equation c) using the unfavourable condition variable action)

G k.selfwt = b ■ h ■ g ■ Pm Fd.selfwt = YG ' G k.selfwt

Modification factors

Factor for medium-duration loading kmod.med = 0.8 and service class 1, kmod.med (Table 2.4 (EC5, Table 3.1))

Size factor for depth greater than kh = 1.0 300 mm, kh (Table 2.11 (EC5, 3.4));

Lateral stability of the beam, kcrit, (4.5.1.2 (EC5, 6.3.3)) Effective length of the beam- lef = 0.281 + 2h £ef = 2.03 m adopt case for the most critical condition - the point load at mid-span, ief (Table 4.2)

Critical bending stress, am.crit, (equation (4.9b); EC5, equation (6.31))

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